CCOB is here! Two-color mixed light application upgrade

LED semiconductor lighting network COB because it is easier to achieve dimming, high brightness and other characteristics, can solve the problem of chromatic aberration, multiple side spots, etc., has been widely used in the field of hotel and commercial store lighting. COB packaging has gradually become the mainstream of the market, and various domestic and international manufacturers have successively launched a variety of new COB products.

With the gradual maturity of COB technology, in the fierce market, some domestic manufacturers of COB packaging devices can compete with foreign companies in performance.

On the technical side, the domestic LED package giants have never stopped the innovation of packaging technology and packaging technology. Recently, a two-color COB light source with uniform cross-distribution composite package has begun to be applied in the market, called CCOB.

Why is it called CCOB? Among them, the first "C" contains the meaning of Compound & Cross:

1. Cross: cross (different color temperature light-emitting chips evenly distributed)

2. Compound: composite (using a flip chip structure, a bare chip unit and at least one wrapped chip unit formed by covering a surface of the bare chip unit with a first phosphor layer, and then covering the above by a second phosphor layer) Chip units make them combine to form different color temperatures)

simply put:

CCOB is a two-color COB source with a uniform cross-distribution composite package. Adjust the brightness ratio of two different light color chips to realize the change of COB light color.

At present, all major light source brands have launched two-color COB, we have made a two-color COB feature comparison:

In order to understand the dimming color performance of CCOB in more detail, the inventor of Guangzhou Tianxin Optoelectronics provided samples for evaluation.

The ceiling light with a CCOB source is 135mm in diameter and the light is lens + reflector.

â–² Schematic diagram of the lamp.

Light source size

â–²COB light source diameter is close to 14mm

Through the fluorescent glue, it can be seen that the CCOB lamp beads encapsulated in the COB light source are yellow and white, 22 yellow beads (low color temperature) and 22 white beads (high color temperature), arranged at intervals.

â–² manufacturers provide high-definition photos of COB light source

Light type: typical scene illumination spot

The height of the light exit is 3 meters, the center of the lamp is 0.6 meters away from the wall, the highest brightness position, different color temperature, and the light type is observed.

â–²The effect of spot light at different color temperatures, no color separation

Round spot, highest brightness position, different color temperature, observe light type.

â–² Round spot effect at different color temperatures, uniform spot, no color separation

The ceiling is installed, the height of the light exit is 3 meters, and the center of the lamp is 0.6 meters away from the wall. The same color temperature position, different brightness positions, observe the light type.

â–²When dimming, there is no obvious color cast or color separation.

Light quality

1

The lowest color temperature file is measured by a smart spectrometer (lighting passport) and the data is measured:

Color temperature = 2811 K

Duv =-0.0032

Ra=84

Rf = 82

Rg = 99

Strobe percentage 0.4%

â–² Measurement data. (lighting passport smart spectrometer measurement data)

The color is very positive, the national standard requires Duv <0.005, the lamp is -0.0032, which meets the standard requirements.

Ra>80, Rf>80, Rg>90, good color rendering.

There is almost no stroboscopic, suitable for indoor space that stays for a long time.

2

The same color temperature position and different brightness positions are measured by lighting the passport.

(lighting passport smart spectrometer measurement data)

When the color temperature position is unchanged, the dimming is good. The color temperature difference measured by the instrument is 115K. The lower the brightness, the higher the stroboscopic percentage, the highest is 1.7%, within the acceptable range (standard recommended value < 6.2% at 185 Hz).

3

The different color temperature positions and the highest brightness positions are measured by lighting the passport i.

â–²Different color temperature measurement results (lighting passport smart spectrometer measurement data)

4

Compare the actual color temperature, illuminance, color rendering index, and strobe percentage by adjusting the controller color temperature scale and brightness.

â–²Measurement results (lighting passport smart spectrometer measurement data)

â–² While adjusting the brightness position, the measured data, color temperature, color rendering index, and strobe percentage have small changes. The color rendering and strobe of each gear are good.

Through evaluation, we verified the good light color quality and light mixing performance of CCOB.

Note: The data of the evaluation product shows that the invention patent application of the product has been accepted by the State Intellectual Property Office and entered the substantive examination stage. And passed the third-party testing and certification, obtained the LM-80 test report, the report shows that the product performance is stable, the light efficiency maintenance rate is high.

to sum up

From smart phones to smart hardware, people's lives have changed in many dimensions, and new demands are constantly being created. The “smart” pace of the lighting industry has never stopped. Smart home lighting and smart hotel lighting have been promoted for a long time, and there are many applications, and smart commercial lighting is considered to be the next widely used field.

The “dimming and coloring” winds provide unlimited possibilities for creating demand for smart lighting. Spaces such as galleries, exhibition halls, restaurants, window displays, and high-end homes need to be flexible in color temperature and dimming. From the initial dimming to dimming and color matching to different application scenarios, intelligent lighting will become more and more humanized and provide better services for people.